wedroid/app/src/main/java/it/unisannio/ding/ids/wedroid/app/view/WListsListActivity.java

package it.unisannio.ding.ids.wedroid.app.view;

import android.content.Intent;
import android.content.res.ColorStateList;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProvider;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.google.android.material.floatingactionbutton.FloatingActionButton;

import java.util.List;
import java.util.Objects;

import it.unisannio.ding.ids.wedroid.app.R;

import it.unisannio.ding.ids.wedroid.app.data.entity.WList;
import it.unisannio.ding.ids.wedroid.app.util.SharedPreferenceHelper;
import it.unisannio.ding.ids.wedroid.app.view.adapter.WListsAdapter;
import it.unisannio.ding.ids.wedroid.app.viewmodel.WListsListViewModel;

public class WListsListActivity extends AppCompatActivity {

    Toolbar myToolbar;
    int barColor;
    WListsListViewModel viewModel;
    RecyclerView recyclerView;
    //SwipeRefreshLayout swipeRefreshLayout;
    SharedPreferenceHelper sp;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_wlists_view);
        myToolbar = findViewById(R.id.my_toolbar);
        setSupportActionBar(myToolbar);
        //swipeRefreshLayout = findViewById(R.id.pullToRefresh);
        sp = new SharedPreferenceHelper(this);

        Intent i = getIntent();
        String boardTitle = i.getStringExtra("barTitle");
        Objects.requireNonNull(getSupportActionBar()).setTitle(boardTitle);
        barColor = i.getIntExtra("barColor", 0);
        setResult(WListsListActivity.RESULT_OK, i);

        myToolbar.setBackgroundColor(barColor);

        recyclerView = findViewById(R.id.recyclerviewWList);
        initializeUi(sp.getBoardId());

        FloatingActionButton fab = findViewById(R.id.synchronize);
        fab.setBackgroundTintList(ColorStateList.valueOf(barColor));
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                viewModel.refresh();
            }
        });
    }

    private void initializeUi(final String idBoard) {
        final WListsAdapter adapter = new WListsAdapter(this);
        recyclerView.setAdapter(adapter);
        recyclerView.setLayoutManager(new LinearLayoutManager(this,
                LinearLayoutManager.HORIZONTAL, false));
        //recyclerView.setHasFixedSize(true);

        viewModel = new ViewModelProvider(this).get(WListsListViewModel.class);

        viewModel.getAllWLists().observe(this, new Observer<List<WList>>() {
            @Override
            public void onChanged(List<WList> wLists) {
                adapter.setWLists(wLists);
            }
        });

        swipeBottomToDelete(idBoard);

     /*   BUG REPORT: Refresh of page enter in conflict with swipe down for delete list
      * swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                viewModel.refresh();
            }
        });*/
    }

    private void swipeBottomToDelete(final String idBoard) {
        ItemTouchHelper.SimpleCallback simpleCallback = new ItemTouchHelper.SimpleCallback(0,
                ItemTouchHelper.DOWN) {
            @Override
            public boolean onMove(@NonNull RecyclerView recyclerView,
                                  @NonNull RecyclerView.ViewHolder viewHolder,
                                  @NonNull RecyclerView.ViewHolder target) {

                return true;
            }

            @Override
            public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
                int pos = viewHolder.getAdapterPosition();
                viewModel.deleteWList(pos, idBoard);
                Toast.makeText(getApplicationContext(), "List deleted", Toast.LENGTH_LONG).show();

            }
        };
        new ItemTouchHelper(simpleCallback).attachToRecyclerView(recyclerView);
    }
}